_ Method of increasing Shocks, &c. 137 
It will be necessary that the correspondent at the seaport should 
write a letter of advice to the administrator of the Royal Manufac- 
tory at Sevres near Paris, before the forwarding—that the latter 
may obtain from the director general of the customs, that the box 
may arrive under seal, sous plomb, and that it may not be opened 
at Paris: this is very important, to the end that there may be no de- 
rangement of labels, nor any breakage. It is equally important that 
the tickets which may indicate the places where the pieces were 
made, or those from which they come, should not be separated and 
mixed during the unpacking. It is desired therefore that they may 
be fastened either with glue, or with good wafers, or with twine. 
Lastly, it is very desirable that: there should be attached to the 
case a separate box, either of lead or of tin, or that there should be 
sent separately, notes, previously made, of the objects collected and 
forwarded ; taking care that a correspondence be established between 
the objects and the notes, by means of numbers, which shall follow 
each other, or by numbering the series. 
ALEXANDRE BRoNGNIART. 
Art. XI.—Method of increasing shocks, and experiments, with 
Prof. Henry’s ie o= ate sparks and shocks nifrom 
the Calorimotor ; by C. G 
Salem, May 12th, 1836. 
‘ PROFESSOR SILLIMAN. 
Dear Sir—I have lately constructed an apparatus for obtaining 
shocks from the calorimotor, which has furnished some curious results, 
and as*you may perbaps, deem them worthy of publication, I send 
you herewith, a sectional drawing of the apparatus with a description. 
220 fee 
170 “ 
wre LIQ “ 
50 (a3 
Cc 
S 
ie a) 
The figure represents a section of an apparatus for obtaining shocks 
from the calorimotor. The coil of copper ribbon, contained in the 
box 4, is 220 feet — an inch wide, and has but four solderings or 
Vou. XXXI—N 18 
